Portable power supply



FIG. 1 is a first perspective view of a portable power supply, showing our design.

FIG. 2 is a second perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof.

FIG. 8 is a bottom plan view thereof.

FIG. 9 is a perspective view of the portable power supply with the handle in an open position;

FIG. 10 is an enlarged view of a circle labeled 10 in FIG. 1 of the portable power supply.

FIG. 11 is an enlarged view of a circle labeled 11 in FIG. 1 of the portable power supply.

FIG. 12 is an enlarged view of a circle labeled 12 in FIG. 2 of the portable power supply; and,

FIG. 13 is an enlarged view of an area labeled 13 in FIG. 7 of the portable power supply.

The dash-dash broken lines in the drawings are for the purpose of illustrating portions of the portable power supply that form no part of the claimed design. The dash-dot broken lines shown in FIGS. 1, 2, 7, 10, 11, 12, and 13 are for the purpose of illustrating a boundary of each encircled portion and form no part of the claimed design. 

CLAIM The ornamental design for a portable power supply, as shown and described. 